<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Examples</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
<script>
window.onload=function(){
var oUl=document.getElementById("ul");
var oBtn=document.getElementById("btn1");
var oTxt=document.getElementById("txt1");
var oLi=oUl.getElementsByTagName('li');
oBtn.onclick=function(){
var oA=document.createElement('li');
oA.innerHTML=oTxt.value;
if(oLi.length>0){
oUl.insertBefore(oA,oLi[0]);
}else{
oUl.appendChild(oA);
}
}
}
</script>
</head>
<body>
<h2>创建DOM元素</h2>
<input type="text" id="txt1">
<input type="button" value="创建" id="btn1">
<ul id="ul"></ul>
</body>
</html>
